Type-writer key and type-bar mechanism.



J.- ALEXANDER. TJYPE WRITER KEY AND TYPELEAE MEoEANIsM.'

A'PPLIOATIO FILED NOY". 17, 1908. ENEWED 0,0121

Patented Jan. 2, 1912.

2 SHEETS-SHEET 2 UN 1TED STATES JESSE ALEXANDER, QF BROOKLYN, NEW YGRK, ASSIGDTOR OF ONE-HALF T@ D, N..

THAYER, OF NEW YORK, N. Y. i

TYPE-WRI'TER KEY AND TYIFE-BAR MECHANXSM Specification of Letters Patent.

Patented. Jan. 2,

Application filed November 17, 1908, Serial No. 462,990. Renewed October 19, 1911. Serie-.1 No. Sital.

To all whom 'it may concern:

Be it known that I. Jlcssn Arlt-mannen, a

.citizen of the United States, residing at Brooklyn, county of Kings, State of New York, have inventedcertain new and use'- ul Improvements in Type-Tri ter `Keys and Type-Bar Mechanism, of which the following is ay full, clear, and exact description.

My invention relates to typewri'ting nia-- chines,` and is more particularly concerned with improvements in the construction ot' the key and type-bar mechanism and connections for operating the same.

The object of the invention is to secure the lightest possible touch upon the key 1evers to a`ctuate the type, while at the same time securing an effectual blow .of the type against'the platen to make a clear impression. A i

A. further object is to simplitythe key and type-har mechanism and to i'educ it to the fewest parts.

Wit these and other objects in view, the invention vconsists in .the construction and arrangement of parts, a particular embodiment of which is illustrated in the accompanying drawings, in Which- Figure 1 is a Vertical sectional view of a typewriting machine, showing the type-bar at rest, Fig. 2 is a similar view showing the type-bar in printing position.

' In the embodiment ofmy invention l`nerein selected for illustration, theft/typewriting machine consists otthe usual frame or body portion 1, and platen 2, the latter loeing indicated in dottedout-line.

3 indicateslthe support upon which the levers 4 are pivotcd at Mountedlupon a suitable support 6 extending over the key levers is a series of type-bar actuating levers 7 which are pivoted to said support at 8, and each of which hasa, rearwardly extending' arm 9provided with a slot 1() which engages an actuatine' pin 11 on the corresponding key lever 4.

The type hars 12 are pivotally mounted at 13 `upon the usual cradle or support 14, said type-loars heilig supported at their outer ends, when at rest, upon a lcdgeor plate 15. Upon each type-'bar is indicated the usual lower and uppercase type 16 and 17 although `the shift mechanism for bringing the upper case type into operation is here 'ot the link 21 against the actuating ein 1S), vwhereby owing to the considerable distance 'type-har to the printing point.

omitted as this forms no partot the pre1*- ent invention.

vThe heel ot" the type-har is provided with an odset 18 which carries an actua-,ting pin 19 with which a shoulder 2Q upon the link 21, which forms the connection hetwceu the type-bar and actuating lever Y, engages. Aiso upon the heel of the type har is a ond actuating pin 22 which engages a slot 23 in the link 21. Link 21 is connected with actuating lever A7 preferably h v pivot con` nection 24. i

In the normal position et the type-har, or when it is at rest, as shown in 1, actuating' pin 19 engages the shouider 2() of the link 21 while the secoue z .for 22 rests in the rear end ci the link. As the key lever 1 i s depressed an the upper end 'of the aci'z'zatinp iever' i i moved to the rear, an initial unpulse is given to the type-'bar through shoulder f.

between the pivot point 13 ot the type-bar and actuating pin 19 the lightest touch upon the key will serve to start the travel of the As the ink S0 21 is drawn to ther-ear, the forward end of the slot 23 therein is brought against the pin 22 and the remaining travel of the type-bar is effected through this connection, While at the same time pin 19 by reason of its greater distance from the type-har pivot 13 leaves the shoulder 20 and completes its travel I along the recess 25 at the upper edge of the vlink 21 untii said pinlcrings up against the shoulder 26 at'the rear end of said recess. 90

@wing to the shortdistan'ce between the pivot point 13 of the type-har and the pivot pin 22, a powerful impulse is given to the type-bar during the latter part off its travel to the printing, position, whereby clear printing impression is secured. Furthermore, the pin 19 and shoulder 21S at the rear of the recess 25 are so relatively positioned that said pin engages said shoulder just he fore the type of the type-bar reaches the platen, whereby after the printing blow is delivered, the type, by the resiliency ot the type-bar, is freed lfrom the paper vand quickly returned to position of rest.

1t will be observed that the several advantages of light touch. upon the key lever for imparting initial movement to the type-har; strong impulse for delivery of the printing blow, the freeing of the type from the in detailand arrangement ofvparts without I prising a type-bar,

de artingfrom the spirit or scope thereof.

iat I claim is- 1. A key andvtype-bar mechanism, comprising a key lever,

diate actuating lever or said bar, a link vconnecting said actuating lever and'said bar,

a connection between sald link and bar remote from the pivot of the latter to impart easy initial movement thereto and. a lost motion connection between said link and bar adjacent to the pivot point of the harto impart a strong printing impulse to the latter. f l

2. A key and type-bar'mechanism, 'comprising va key lever, a tvpe-loar,`an intermediate actuating lever or said bar, a link connecting said actuating lever and bar, said link having a slidable connection withsaid bar remote from the pivot point thereof, and having a lost motion connection with said bar adjacent to said pivot poing-said second connection arranged to continue the printing stroke of the bar after initial rfc-fement from said first connection.

3. A key and type-bar mechanism, coma loar actuating lever, a link connecting said parts, a slidable connection between said link and bar at a point. remote from the pivot point of the latter to impart easy initial movement to said bar, and a pinand slot connection between said a t pe-bar, an intermelinkand har adjacent to the pivot point of the bar to continue said movement and to impart a strong printing impulse to the har.

4. A key and type-bar mechanism, comprising a type-bar, an actuating lever therefor, a link connecting said parts, said link having means to free the type-bar from the platen at the completion of the printing stroke. 5. A key and type-bar mechanism, comprising a type-bar, an actuating lever therefor, a link connecting said partszand a slidable connection between said link and bar to impart initial movement to the latter and to free the type-bar from the platen at the completion of the printing stroke.

6. A keyand type-bar mechanism, comprising a type-har,4 and an actuating link therefor, a shoulderfon one of said parts, a-

pin on the other ofsaid parts engaging said shoulder whereby to impart initial movement to said bar, and a second shoulder on one of said parts arranged to stop said pin at the completion of the printingstroke to free theA type-bar from the platen andan actuating lever connected with said link.

7. A key and type-bar mechanism .comprising a type-bar, an actuating lever therefor, a link connecting said parts, a slidahle connection between said link and har remote from the bar pivot arranged to impart initial movement to Said har and to free the bar from the platen upon completion of the printing stroke and a pin and slot connection between said link and bar adjacent to the pivot point of the latter arranged to take up said initial movement and impart a strong printing impulse `'t'o said bar.

JESSE ALEX-ANDER.

Witnesses: l i

R.' C. POWELL, H. lV. CONRAD. 

